LogSeq/pages/Git status in shell prompt with Nix Home Manager.md

created:: 2024-01-25T16:49:34 (UTC -05:00) tags:: nixos source:: https://jeffkreeftmeijer.com/nix-home-manager-git-prompt/ author:: Jeff Kreeftmeijer

• Git status in shell prompt with Nix Home Manager

  Excerpt

  By on 2023-03-19 (originally published on 2023-03-13)

  ---

  By on 2023-03-19 (originally published on 2023-03-13)

  Git comes with a script named git-prompt.sh that exposes information about the current directory’s repository to use in your shell’s prompt. The script is in the contrib directory, but I used to extract it to not have to download the git source to set my prompt.

  Using Nix, the prompt is available in the ~/.nix-profile directory, meaning setting up the prompt doesn’t require remembering to download an extra file. Instead, it’s three lines in programs.zsh.initExtra to source the script and set the prompt¹:

  programs.zsh.initExtra =
  ''
  source ~/.nix-profile/share/git/contrib/completion/git-prompt.sh
  setopt PROMPT_SUBST
  export PS1='%~ $(__git_ps1 "(%s) ")%# '
  '';
  

  This produces prompts like ~/repository (main) % inside a git repository, and ~/not/a/repository % elsewhere.

  ---

  1. This example is for zsh, omit the setopt and alter the PS1 for bash:

  ```
  programs.bash.initExtra =
  ''
  source ~/.nix-profile/share/git/contrib/completion/git-prompt.sh
  export PS1='\w $(__git_ps1 "(%s) ")$ '
  '';
  ```
  
  [↩︎](https://jeffkreeftmeijer.com/nix-home-manager-git-prompt/#fnr.1)